Image device with improved chrominance quality

ABSTRACT

An image device includes a plurality of red sub-pixels, a plurality of green sub-pixels, a plurality of blue sub-pixels, a plurality of white sub-pixels, and a plurality of yellow sub-pixels. A ratio of the total number of red sub-pixels to the total number of green sub-pixels to the total number of blue sub-pixels to the total number of white sub-pixels and to the total number of yellow sub-pixels is about 3:3:3:2:1.

FIELD

The present disclosure relates to an image device, more particularly toa system and method to improve the chrominance quality of an imagedevice or a display by the utilization of RGBW pixels and RGBY pixels.

BACKGROUND

Referring to FIG. 1, it shows a conventional RGBW display 10. Theconventional RGBW display 10 comprises a plurality of RGBW pixels 11.Each RGBW pixel 11 comprises a green sub-pixel 111, a red sub-pixel 112,a blue sub-pixel 113 and a white sub-pixel 114 arranged in a 2×2 matrix.The conventional RGBW display 10 has the merit of enhanced color spaceand improved brightness and contrast, compared with traditional RGBdisplay. U.S. Pat. No. 4,892,391, U.S. Pat. No. 5,757,452, U.S. Pat.Nos. 7,286,136, 7,742,205, and U.S. Pat. No. 7,583,279 teach RGBWdisplays. However, the conventional RGBW display 10 has the deficiencyof dark yellow. U.S. Pat. No. 4,800,375, U.S. Pat. No. 7,864,271, andU.S. Pat. No. 8,749,727 teach RGBY displays which claim to have betteryellow color. However, RGBY display lacks the merits of RGBW displays.U.S. Pat. No. 7,248,314, U.S. Pat. No. 7,995,019, U.S. Pat. No.8,248,440, U.S. Pat. No. 8,441,601 and U.S. Pat. No. 8,558,857 teachdisplays with five color sub-pixels. However five color displays havethe deficiency of high cost and low brightness and contrast. U.S. Pat.No. 8,384,653 teaches a method to relief the dark yellow problem byclassifying the image signal and then adjusts the backlight luminanceaccording to the classification.

BRIEF DESCRIPTION OF THE DRAWINGS

Implementations of the present technology will now be described, by wayof example only, with reference to the attached figures, wherein:

FIG. 1 illustrates a conventional RGBW display.

FIG. 2 illustrates an image device according to a first embodiment ofthe present disclosure.

FIG. 3 illustrates an example of the image device of FIG. 2 according tothe first embodiment of the present disclosure.

FIG. 4 illustrates another image device according to a second embodimentof the present disclosure.

FIG. 5 illustrates an example the image device of FIG. 4 according tothe second embodiment of the present disclosure.

FIGS. 6-21 illustrate several modified examples of the image deviceaccording to the first embodiment of the present disclosure.

FIGS. 22-25 illustrate several modified examples of the image devicesaccording to the second embodiment of the present disclosure.

FIG. 26 illustrates an image device according to a third embodiment ofthe present disclosure.

FIG. 27 illustrates an example of the image device of FIG. 26 accordingto the third embodiment of the present disclosure.

FIGS. 28-33 illustrate several modified examples of the image devicesaccording to the third embodiment of the present disclosure.

FIG. 34 illustrates an image device according to a fourth embodiment ofthe present disclosure.

FIG. 35 illustrates an example of the image device of FIG. 34 accordingto the fourth embodiment of the present disclosure.

FIGS. 36-39 illustrate several modified examples of the image devicesaccording to the fourth embodiment of the present disclosure.

DETAILED DESCRIPTION

It will be appreciated that for simplicity and clarity of illustration,where appropriate, reference numerals have been repeated among thedifferent figures to indicate corresponding or analogous elements. Inaddition, numerous specific details are set forth in order to provide athorough understanding of the embodiments described herein. However, itwill be understood by those of ordinary skill in the art that theembodiments described herein can be practiced without these specificdetails. In other instances, methods, procedures and components have notbeen described in detail so as not to obscure the related relevantfeature being described. Also, the description is not to be consideredas limiting the scope of the embodiments described herein. The drawingsare not necessarily to scale and the proportions of certain parts havebeen exaggerated to better illustrate details and features of thepresent disclosure.

Several definitions that apply throughout this disclosure will now bepresented.

The term “coupled” is defined as connected, whether directly orindirectly through intervening components, and is not necessarilylimited to physical connections. The connection can be such that theobjects are permanently connected or releasably connected. The term“outside” refers to a region that is beyond the outermost confines of aphysical object. The term “inside” indicates that at least a portion ofa region is partially contained within a boundary formed by the object.The term “substantially” is defined to be essentially conforming to theparticular dimension, shape or other word that substantially modifies,such that the component need not be exact. For example, substantiallycylindrical means that the object resembles a cylinder, but can have oneor more deviations from a true cylinder. The term “comprising,” whenutilized, means “including, but not necessarily limited to”; itspecifically indicates open-ended inclusion or membership in theso-described combination, group, series and the like.

The present disclosure is relates to an image device with improvedchrominance quality. The image device comprises a substrate and aplurality of pixels disposed on the substrate to display an image. Thepixels comprise a plurality of sub-pixels. The sub-pixels, e.g., a Rsub-pixel representing a red color, a G sub-pixel representing a greencolor, a B sub-pixel representing a blue color, a W sub-pixelrepresenting a white color, and a Y sub-pixel representing a yellowcolor, will be described in detail.

Referring to FIG. 2, it illustrates an image device 20 according to anembodiment of the present disclosure. The image device 20 comprises aplurality of pixels each comprising a plurality of sub-pixels withdifferent colors arranged in a matrix of rows and columns. As shown inFIG. 2, the image device 20 comprises a plurality of white sub-pixels204 and a plurality of yellow sub-pixels 205. Every other row compriseswhite sub-pixels 204 and yellow sub-pixels 205. Namely, in any twoadjacent rows, the white sub-pixels 204 and the yellow sub-pixels 205are arranged in the same row. In this row, white sub-pixels 204 andyellow sub-pixels 205 are separately disposed, and two white sub-pixels204 are arranged between two yellow sub-pixels 205. Furthermore, thewhite sub-pixels 204 are arranged in the columns without yellowsub-pixels 205, and the yellow sub-pixels 205 are arranged in thecolumns without white sub-pixels 204. The white sub-pixels 204 and theyellow sub-pixels 205 arranged in any two adjacent columns arerespectively arranged in different rows. The white sub-pixels 204arranged in any two adjacent columns are respectively arranged indifferent rows. FIG. 2 shows an arrangement rule of the sub-pixels.

Referring to FIG. 3, it illustrates an example of the image device 20 ofFIG. 2 according to the first embodiment of the present disclosure. Theimage device 20 comprises a plurality of pixels comprising a pluralityof sub-pixels with different colors arranged in a matrix of rows andcolumns. As shown in FIG. 3, the image device 20 comprises a pluralityof A sub-pixels 201, a plurality of B sub-pixels 202, a plurality of Csub-pixels 203, a plurality of white sub-pixels 204 and a plurality ofyellow sub-pixels 205. In any 2×2 matrix 21, there are always one Asub-pixel 201, one B sub-pixel 202, and one C sub-pixel 203. In otherwords, the image device 20 may comprise a plurality of ABCW pixels and aplurality of ABCY pixels. Each ABCW pixel comprises a A sub-pixel 201, aB sub-pixel 202, a C sub-pixel 203 and a white sub-pixel 204. Each ABCYpixel comprises a A sub-pixel 201, a B sub-pixel 202, a C sub-pixel 203and a yellow sub-pixel 205. The ABCW pixels and the ABCY pixels aremixed in the image device 20. The A sub-pixel 201, B sub-pixel 202, andC sub-pixel 203 may respectively be a red sub-pixel, a green sub-pixel,or a blue sub-pixel, as required or designed. Namely, the A sub-pixel201 may be a red sub-pixel, a green sub-pixel, or a blue sub-pixel, theB sub-pixel 202 may be a red sub-pixel, a green sub-pixel, or a bluesub-pixel, and the C sub-pixel 203 may be a red sub-pixel, a greensub-pixel, or a blue sub-pixel.

Referring to FIG. 4, it illustrates an image device according to asecond embodiment of the present disclosure. The image device 30comprises a plurality of pixels comprising a plurality of sub-pixelswith different colors arranged in a matrix of rows and columns. As shownin FIG. 4, the image device 30 comprises a plurality of white sub-pixels304 and a plurality of yellow sub-pixels 305. Every other columncomprises white sub-pixels 304 and yellow sub-pixels 305. Namely, in anytwo adjacent columns, all of the white sub-pixels 304 and the yellowsub-pixels 305 are arranged in the same column. In this column, whitesub-pixels 304 and yellow sub-pixels 305 are separately disposed, andtwo white sub-pixels 304 are arranged between two yellow sub-pixels 305.Furthermore, the white sub-pixels 304 are arranged in the rows withoutyellow sub-pixels 305, and the yellow sub-pixels 305 are arranged in therows without white sub-pixels 304. The white sub-pixels 304 and theyellow sub-pixels 305 arranged in any two adjacent rows are respectivelyarranged in different columns. The white sub-pixels 304 arranged in anytwo adjacent rows are respectively arranged in different columns. FIG. 4shows an arrangement rule of the sub-pixels, which is similar toarrangement rule shown in FIG. 2 but rotates 90 degrees.

Referring to FIG. 5, it illustrates an example of the image device 30 ofFIG. 4 according to the second embodiment of the present disclosure. Theimage device 30 comprises a plurality of pixels comprising a pluralityof sub-pixels with different colors arranged in a matrix of rows andcolumns. As shown in FIG. 5, the image device 30 comprises a pluralityof A sub-pixels 301, a plurality of B sub-pixels 302, a plurality of Csub-pixels 303, a plurality of white sub-pixels 304 and a plurality ofyellow sub-pixels 305. In any 2×2 matrix 31, there are always one Asub-pixel 301, one B sub-pixel 302, and one C sub-pixel 303. In otherwords, the image device 30 may comprise a plurality of ABCW pixels and aplurality of ABCY pixels. Each ABCW pixel comprises a A sub-pixel 301, aB sub-pixel 302, a C sub-pixel 303 and a white sub-pixel 304. Each ABCYpixel comprises a A sub-pixel 301, a B sub-pixel 302, a C sub-pixel 303and a yellow sub-pixel 305. The ABCW pixels and the ABCY pixels aremixed in the image device 30. The A sub-pixel 301, B sub-pixel 302, andC sub-pixel 303 may respectively be a red sub-pixel, a green sub-pixel,or a blue sub-pixel, as required or designed. Namely, the A sub-pixel301 may be a red sub-pixel, a green sub-pixel, or a blue sub-pixel, theB sub-pixel 302 may be a red sub-pixel, a green sub-pixel, or a bluesub-pixel, and the C sub-pixel 303 may be a red sub-pixel, a greensub-pixel, or a blue sub-pixel.

FIG. 6 throughout 21 illustrate several modified examples of imagedevices 40A-40P following the arrangement rule of the white sub-pixelsand yellow sub-pixel described above shown in FIG. 2 according to thefirst embodiment of the present disclosure. Each of the image devices40A-40P comprises a plurality of pixels comprising a plurality ofsub-pixels with different colors arranged in a matrix of rows andcolumns. More specifically, each of the image devices 40A-40P comprisesa plurality of RGBW pixels 42 and a plurality of RGBY pixels 44. EachRGBW pixels 42 comprises a red sub-pixel 401, a green sub-pixel 402, ablue sub-pixel 403 and a white sub-pixel 404. Each RGBY pixel comprisesa red sub-pixel 401, a green sub-pixel 402, a blue sub-pixel 403 and ayellow sub-pixel 405. The RGBW pixels 42 and the RGBY pixels 44 aremixed in the image device 40A-40P.

As shown in FIGS. 6-21, each of the image devices 40A-40P comprises aplurality of white sub-pixels 404 and a plurality of yellow sub-pixels405. Every other row comprises white sub-pixels 404 and yellowsub-pixels 405. Namely, in any two adjacent rows, the white sub-pixels404 and the yellow sub-pixels 405 are arranged in the same row. In thisrow, white sub-pixels 404 and yellow sub-pixels 405 are separatelydisposed, and two white sub-pixels 404 are arranged between two yellowsub-pixels 405. Furthermore, the white sub-pixels 404 are arranged inthe columns without yellow sub-pixels 405, and the yellow sub-pixels 405are arranged in the columns without white sub-pixels 404. The whitesub-pixels 404 and the yellow sub-pixels 405 arranged in any twoadjacent columns are respectively arranged in different rows. The whitesub-pixels 404 arranged in any two adjacent columns are respectivelyarranged in different rows.

As shown in FIGS. 6-21, a basic repeating unit 46 is defined. The basicrepeating unit 46 is a 4×6 matrix with different color sub-pixels.Repeating the basic repeating unit 46 as much as required to form eachof the image devices 40A-40P. In the basic repeating unit 46, a ratio ofthe number of red sub-pixels 401 to the number of green sub-pixels 402to the number of blue sub-pixels 403 to the number of white sub-pixels404 and to the number of yellow sub-pixels 405 is about 3:3:3:2:1.Furthermore, in the basic repeating unit 46, a ratio of the total areaof red sub-pixels 401 to the total area of green sub-pixels 402 to thetotal area of blue sub-pixels 403 to the total area of white sub-pixels404 and to the total area of yellow sub-pixels 405 is about 3:3:3:2:1.

As shown in FIGS. 6-21, a 4×3 matrix 48 is defined. In the 4×3 matrix48, a ratio of the number of red sub-pixels 401 to the number of greensub-pixels 402 to the number of blue sub-pixels 403 to the number ofwhite sub-pixels 404 and to the number of yellow sub-pixels 405 is about3:3:3:2:1. Furthermore, in the 4×3 matrix 48, a ratio of the total areaof red sub-pixels 401 to the total area of green sub-pixels 402 to thetotal area of blue sub-pixels 403 to the total area of white sub-pixels404 and to the total area of yellow sub-pixels 405 is about 3:3:3:2:1.

More specifically, when chooses any 4×3 matrix in the image devices40A-40P, a ratio of the number of red sub-pixels 401 to the number ofgreen sub-pixels 402 to the number of blue sub-pixels 403 to the numberof white sub-pixels 404 and to the number of yellow sub-pixels 405 isabout 3:3:3:2:1. When chooses any 4×3 matrix in the image devices40A-40P, a ratio of the total area of red sub-pixels 401 to the totalarea of green sub-pixels 402 to the total area of blue sub-pixels 403 tothe total area of white sub-pixels 404 and to the total area of yellowsub-pixels 405 is about 3:3:3:2:1.

FIGS. 22-25 illustrate several modified examples of image devices50A-50D following the arrangement rule of the white sub-pixels andyellow sub-pixel described above shown in FIG. 4 according to the secondembodiment of the present disclosure. Each of the image devices 50A-50Dcomprises a plurality of pixels comprising a plurality of sub-pixelswith different colors arranged in a matrix of rows and columns. Morespecifically, each of the image devices 50A-50D comprises a plurality ofRGBW pixels 52 and a plurality of RGBY pixels 54. Each RGBW pixels 52comprises a red sub-pixel 501, a green sub-pixel 502, a blue sub-pixel503 and a white sub-pixel 504. Each RGBY pixel comprises a red sub-pixel501, a green sub-pixel 502, a blue sub-pixel 503 and a yellow sub-pixel505. The RGBW pixels 52 and the RGBY pixels 54 are mixed in each of theimage devices 50A-50D.

As shown in FIGS. 22-25, each of the image devices 50A-50D comprises aplurality of white sub-pixels 504 and a plurality of yellow sub-pixels505. Every other column comprises white sub-pixels 504 and yellowsub-pixels 505. Namely, in any two adjacent columns, the whitesub-pixels 504 and the yellow sub-pixels 505 are arranged in the samecolumn. In this column, white sub-pixels 504 and yellow sub-pixels 505are separately disposed, and two white sub-pixels 504 are arrangedbetween two yellow sub-pixels 505. Furthermore, the white sub-pixels 504are arranged in the rows without yellow sub-pixels 505, and the yellowsub-pixels 505 are arranged in the rows without white sub-pixels 504.The white sub-pixels 504 and the yellow sub-pixels 505 arranged in anytwo adjacent rows are respectively arranged in different columns. Thewhite sub-pixels 504 arranged in any two adjacent rows are respectivelyarranged in different columns.

As shown in FIGS. 22-25, a basic repeating unit 56 is defined. The basicrepeating unit 56 is a 6×4 matrix with different color sub-pixels.Repeating the basic repeating unit 56 as much as required to form eachof the image devices 50A-50D. In the basic repeating unit 56, a ratio ofthe number of red sub-pixels 501 to the number of green sub-pixels 502to the number of blue sub-pixels 503 to the number of white sub-pixels504 and to the number of yellow sub-pixels 505 is about 3:3:3:2:1.Furthermore, in the basic repeating unit 56, a ratio of the total areaof red sub-pixels 501 to the total area of green sub-pixels 502 to thetotal area of blue sub-pixels 503 to the total area of white sub-pixels504 and to the total area of yellow sub-pixels 505 is about 3:3:3:2:1.

As shown in FIGS. 22-25, a 3×4 matrix 58 is defined. In the 3×4 matrix58, a ratio of the number of red sub-pixels 501 to the number of greensub-pixels 502 to the number of blue sub-pixels 503 to the number ofwhite sub-pixels 504 and to the number of yellow sub-pixels 505 is about3:3:3:2:1. Furthermore, in the 3×4 matrix 58, a ratio of the total areaof red sub-pixels 501 to the total area of green sub-pixels 502 to thetotal area of blue sub-pixels 503 to the total area of white sub-pixels504 and to the total area of yellow sub-pixels 505 is about 3:3:3:2:1.

More specifically, when chooses any 3×4 matrix 58 in the image devices50A-50D, a ratio of the number of red sub-pixels 501 to the number ofgreen sub-pixels 502 to the number of blue sub-pixels 503 to the numberof white sub-pixels 504 and to the number of yellow sub-pixels 505 isabout 3:3:3:2:1. When chooses any 3×4 matrix 58 in the image devices50A-50D, a ratio of the total area of red sub-pixels 501 to the totalarea of green sub-pixels 502 to the total area of blue sub-pixels 503 tothe total area of white sub-pixels 504 and to the total area of yellowsub-pixels 505 is about 3:3:3:2:1.

FIG. 26 illustrates an image device 80 according to a third embodimentof the present disclosure. The image device 80 comprises a plurality ofpixels comprising a plurality of sub-pixels with different colorsarranged in a matrix of rows and columns. As shown in FIG. 26, the imagedevice 80 comprises a plurality of W sub-pixels 804 and a plurality of Ysub-pixels 805. Every other column comprises W sub-pixels 804 or Ysub-pixels 805. Namely, in any two adjacent columns, the W sub-pixels804 are arranged in the same column, or the Y sub-pixels 805 arearranged in the same column. The W sub-pixels 804 in the same column areseparately disposed. The Y sub-pixels 805 in the same column areseparately disposed. Furthermore, the W sub-pixels 804 and the Ysub-pixels 805 arranged in any two nearby columns, which are separatedby one column without W sub-pixels 804 or the Y sub-pixels 805, arerespectively arranged in different rows. The W sub-pixels 804 arrangedin any two nearby columns, which are separated by one column without Wsub-pixels 804 or the Y sub-pixels 805, are respectively arranged indifferent rows.

FIG. 27 illustrates an example of the image device 80 of FIG. 26according to an embodiment of the present disclosure. The image device80 comprises a plurality of pixels comprising a plurality of sub-pixelswith different colors arranged in a matrix of rows and columns. As shownin FIG. 27, the image device 80 comprises a plurality of M sub-pixels801, a plurality of N sub-pixels 802, a plurality of O sub-pixels 803, aplurality of W sub-pixels 804 and a plurality of Y sub-pixels 805. Inany 2×2 matrix 81, there are always one M sub-pixel 801, one N sub-pixel802, and one O sub-pixel 803. In other words, the image device 80 maycomprise a plurality of MNOW pixels and a plurality of MNOY pixels. EachMNOW pixel comprises a M sub-pixel 801, a N sub-pixel 802, an Osub-pixel 803 and a W sub-pixel 804. Each MNOY pixel comprises a Msub-pixel 801, a N sub-pixel 802, an O sub-pixel 803 and a Y sub-pixel805. The MNOW pixels and the MNOY pixels are mixed in the image device80.

The M sub-pixel 801, the N sub-pixel 802, and the O sub-pixel 803 mayrespectively be a R sub-pixel, a G sub-pixel, or a B sub-pixel, asrequired or designed. Namely, the M sub-pixel 801 may be a R sub-pixel,a G sub-pixel, or a B sub-pixel, the N sub-pixel 802 may be a Rsub-pixel, a G sub-pixel, or a B sub-pixel, and the O sub-pixel 803 maybe a R sub-pixel, a G sub-pixel, or a B sub-pixel.

Furthermore, in the image device 80, a ratio of the number of Msub-pixels 801 to the number of N sub-pixels 802 to the number of Osub-pixels 803 to the number of W sub-pixels 804 and to the number of Ysub-pixels 805 is m:n:o:w:y. The m is substantially equal to the n. Them is substantially equal to the o. The m is larger than w. The m islarger than y. Sum of the w and the y is substantially equal to the m.

FIGS. 28-33 illustrate several modified examples of image devices90A-90F following the arrangement rule of the W sub-pixels and Ysub-pixel described above shown in FIG. 26 according to the thirdembodiment of the present disclosure. Each of the image devices 90A-90Fcomprises a plurality of pixels comprising a plurality of sub-pixelswith different colors arranged in a matrix of rows and columns. Morespecifically, each of the image devices 90A-90F comprises a plurality ofRGBW pixels 92 and a plurality of RGBY pixels 94. Each RGBW pixels 92comprises a R sub-pixel 901, a G sub-pixel 902, a B sub-pixel 903 and aW sub-pixel 904. Each RGBY pixel 94 comprises a R sub-pixel 901, a Gsub-pixel 902, a B sub-pixel 903 and a Y sub-pixel 905. The RGBW pixels92 and the RGBY pixels 94 are mixed in the image device 90A-90F.

As shown in FIGS. 28-33, each of the image devices 90A-90F comprises aplurality of W sub-pixels 904 and a plurality of Y sub-pixels 905. Everyother column comprises W sub-pixels 904 or Y sub-pixels 905. Namely, inany two adjacent columns, the W sub-pixels 904 are arranged in the samecolumn, or the Y sub-pixels 905 are arranged in the same column. The Wsub-pixels 904 arranged in the same column are separately disposed. TheY sub-pixels 905 arranged in the same column are separately disposed.Furthermore, the W sub-pixels 904 and the Y sub-pixels 905 arranged inany two nearby columns, which are separated by one column without Wsub-pixels 904 or the Y sub-pixels 905, are respectively arranged indifferent rows. The W sub-pixels 904 arranged in any two nearby columns,which are separated by one column without W sub-pixels 904 or the Ysub-pixels 905, are respectively arranged in different rows.

As shown in FIGS. 28-33, a basic repeating unit 96 is defined. The basicrepeating unit 96 is a 2×12 matrix with different color sub-pixels.Repeating the basic repeating unit 96 as much as required to form eachof the image devices 90A-90F. In the basic repeating unit 96, a ratio ofthe number of R sub-pixels 901 to the number of G sub-pixels 902 to thenumber of B sub-pixels 903 to the number of W sub-pixels 904 and to thenumber of Y sub-pixels 905 is m:n:o:w:y. The m is substantially equal tothe n. The m is substantially equal to the o. The m is larger than w.The m is larger than y. Sum of the w and the y is substantially equal tothe m.

In this embodiment, a ratio of the number of R sub-pixels 901 to thenumber of G sub-pixels 902 to the number of B sub-pixels 903 to thenumber of W sub-pixels 904 and to the number of Y sub-pixels 905 isabout 3:3:3:2:1. Furthermore, in the basic repeating unit 96, a ratio ofthe total area of R sub-pixels 901 to the total area of G sub-pixels 902to the total area of B sub-pixels 903 to the total area of W sub-pixels904 and to the total area of Y sub-pixels 905 is about 3:3:3:2:1.

FIG. 34 illustrates an image device according to a fourth embodiment ofthe present disclosure. The image device 60 comprises a plurality ofpixels comprising a plurality of sub-pixels with different colorsarranged in a matrix of rows and columns. As shown in FIG. 34, the imagedevice 60 comprises a plurality of W sub-pixels 604 and a plurality of Ysub-pixels 605. The W sub-pixels 604 are arranged in the columns withoutY sub-pixels 605, and the Y sub-pixels 605 are arranged in the columnswithout W sub-pixels 604. Each of the W sub-pixels 604 and each of the Ysub-pixels 605 are separately arranged in different columns. The Wsub-pixels 604 in the same column are separately disposed. The Ysub-pixels 605 in the same column are separately disposed. Furthermore,the W sub-pixels 604 and the Y sub-pixels 605 arranged in any twoadjacent columns are respectively arranged in different rows. The Wsub-pixels 604 and the Y sub-pixels 605 arranged in any two separatedcolumns are separated by two columns without W sub-pixels 604 or the Ysub-pixels 605. The W sub-pixels 604 arranged in any two nearby columns,which are separated by one column without W sub-pixels 604 or the Ysub-pixels 605, are respectively arranged in different rows.

FIG. 35 illustrates an example of the image device 60 of FIG. 34according to the fourth embodiment of the present disclosure. The imagedevice 60 comprises a plurality of pixels comprising a plurality ofsub-pixels with different colors arranged in a matrix of rows andcolumns. As shown in FIG. 35, the image device 60 comprises a pluralityof M sub-pixels 601, a plurality of N sub-pixels 602, a plurality of Osub-pixels 603, a plurality of W sub-pixels 604 and a plurality of Ysub-pixels 605. In a 2×2 matrix 61, there are always one M sub-pixel601, one N sub-pixel 602, and one O sub-pixel 603. In other words, theimage device 60 may comprise a plurality of MNOW pixels and a pluralityof MNOY pixels. Each MNOW pixel comprises a M sub-pixel 601, a Nsub-pixel 602, an O sub-pixel 603 and a W sub-pixel 604. Each MNOY pixelcomprises a M sub-pixel 601, a N sub-pixel 602, an O sub-pixel 603 and aY sub-pixel 605. The MNOW pixels and the MNOY pixels are mixed in theimage device 60.

The M sub-pixel 601, the N sub-pixel 602, and the O sub-pixel 603 mayrespectively be a R sub-pixel, a G sub-pixel, or a B sub-pixel, asrequired or designed. Namely, the M sub-pixel 601 may be a R sub-pixel,a G sub-pixel, or a B sub-pixel, the N sub-pixel 602 may be a Rsub-pixel, a G sub-pixel, or a B sub-pixel, and the O sub-pixel 603 maybe a R sub-pixel, a G sub-pixel, or a B sub-pixel.

Furthermore, in the image device 60, a ratio of the number of Msub-pixels 601 to the number of N sub-pixels 602 to the number of Osub-pixels 603 to the number of W sub-pixels 604 and to the number of Ysub-pixels 605 is m:n:o:w:y. The m is substantially equal to the n. Them is substantially equal to the o. The m is larger than w. The m islarger than y. Sum of the w and the y is substantially equal to the m.

FIGS. 36-39 illustrate several modified examples of image devices70A-70D following the arrangement rule of the W sub-pixels and Ysub-pixel described above shown in FIG. 34 according to the fourthembodiment of the present disclosure. Each of the image devices 70A-70Dcomprises a plurality of pixels comprising a plurality of sub-pixelswith different colors arranged in a matrix of rows and columns. Morespecifically, each of the image devices 70A-70D comprises a plurality ofRGBW pixels 72 and a plurality of RGBY pixels 74. Each RGBW pixels 72comprises a R sub-pixel 701, a G sub-pixel 702, a B sub-pixel 703 and aW sub-pixel 704. Each RGBY pixel 74 comprises a R sub-pixel 701, a Gsub-pixel 702, a B sub-pixel 703 and a Y sub-pixel 705. The RGBW pixels72 and the RGBY pixels 74 are mixed in each of the image devices70A-70D.

As shown in FIGS. 36-39, each of the image devices 70A-70D comprises aplurality of W sub-pixels 704 and a plurality of Y sub-pixels 705. The Wsub-pixels 704 are arranged in the columns without Y sub-pixels 705, andthe Y sub-pixels 705 are arranged in the columns without W sub-pixels704. The W sub-pixels 704 and the Y sub-pixels 705 are separatelyarranged in different columns. The W sub-pixels 704 in the same columnare separately disposed. The Y sub-pixels 705 in the same column areseparately disposed. Furthermore, the W sub-pixels 704 and the Ysub-pixels 705 arranged in any two adjacent columns are respectivelyarranged in different rows. The W sub-pixels 704 arranged in any twonearby columns, which are separated by one column without W sub-pixels704 or the Y sub-pixels 705, are respectively arranged in differentrows.

As shown in FIGS. a basic repeating unit 76 is defined. The basicrepeating unit 76 is a 2×12 matrix with different color sub-pixels.Repeating the basic repeating unit 76 as much as required to form eachof the image devices 70A-70D. In the basic repeating unit 76, a ratio ofthe number of R sub-pixels 701 to the number of G sub-pixels 702 to thenumber of B sub-pixels 703 to the number of W sub-pixels 704 and to thenumber of Y sub-pixels 705 is m:n:o:w:y. The m is substantially equal tothe n. The m is substantially equal to the o. The m is larger than w.The m is larger than y. Sum of the w and the y is substantially equal tothe m.

In this embodiment, a ratio of the number of R sub-pixels 701 to thenumber of G sub-pixels 702 to the number of B sub-pixels 703 to thenumber of W sub-pixels 704 and to the number of Y sub-pixels 705 isabout 3:3:3:2:1. Furthermore, in the basic repeating unit 76, a ratio ofthe total area of R sub-pixels 701 to the total area of G sub-pixels 702to the total area of B sub-pixels 703 to the total area of W sub-pixels704 and to the total area of Y sub-pixels 705 is about 3:3:3:2:1.

Further, a designated white balance status can be maintained byadjusting the blue information of the image device. In case ofliquid-crystal display LCD, for example the backlight color can beadjusted, and/or the thickness, area, and/or pigment of the bluesub-pixels in the color filter can be adjusted, and/or the utilizationof quantum dots can be adjusted so as to adjust the blue information andto maintain a designated white balance status of the image device. Incase of organic light-emitting diode OLED plus color filter, OLED colorcan be adjusted to bluish, and/or the thickness, area, and/or pigment ofthe blue sub-pixels in the color filter can be adjusted, and/or theutilization of quantum dots can be adjusted so as to adjust the blueinformation and to maintain a designated white balance status of theimage device.

The present disclosure also provides methods to determine the ratio ofthe number of RGBW pixels to the number of RGBY pixels in an imagedevice according to the invention. The method according to a firstembodiment of the present disclosure comprises a step for determiningthe ratio by a function of a yellow sub-pixel information, a redsub-pixel information, a green sub-pixel information, a blue sub-pixelinformation and a white sub-pixel information of the image device. Thesub-pixel information comprises the chrominance data and luminance dataof the said sub-pixel. In an embodiment, the yellow sub-pixelinformation comprises the chrominance data and luminance data of theyellow sub-pixel, the red sub-pixel information comprises thechrominance data and luminance data of the red sub-pixel, the greensub-pixel information comprises the chrominance data and luminance dataof the green sub-pixel, and the white sub-pixel information comprisesthe chrominance data and luminance data of the white sub-pixel.

The present disclosure further provides a method to determine the ratioof the number of RGBW pixels to the number of RGBY pixels in an imagedevice according to the invention. The method according to a secondembodiment of the present disclosure comprises a step for determiningthe ratio by a function of a yellow sub-pixel information and a whitesub-pixel information of the image device. The sub-pixel informationcomprises the chrominance data and luminance data of the said sub-pixel.In an embodiment, the yellow sub-pixel information comprises thechrominance data and luminance data of the yellow sub-pixel, and thewhite sub-pixel information comprises the chrominance data and luminancedata of the white sub-pixel.

By the addition of RGBY pixels, the problem of dark yellow in theconventional RGBW display can be solved and chrominance quality can beimproved. The present invention thus can solve the dark yellow problemof conventional RGBW display. The bluish problem can also be solved bythe addition of RGBY pixels.

The present disclosure also provides a method to determine the ratio ofthe number of RGBW pixels to the number of RGBY pixels in an imagedevice. The method comprises a step for determining the ratio by afunction of a yellow sub-pixel information, a red sub-pixel information,a green sub-pixel information, a blue sub-pixel information and a whitesub-pixel information of the image device.

The present disclosure also provides a method to determine the ratio ofthe number of RGBW pixels to the number of RGBY pixels in an imagedevice. The method comprises a step for determining the ratio by afunction of a yellow sub-pixel information and a white sub-pixelinformation of the image device.

In another embodiment, the filter of the white sub-pixels can be madebluish so that the emitted light from the white sub-pixels is bluishrather than pure white. The bluish-white color sub-pixels compensate theyellow color of the additional yellow sub-pixels. As a result adesignated white balance status of the image device can be maintained.

The embodiments shown and described above are only examples. Manydetails are often found in the art such as the other features of animage device. Therefore, many such details are neither shown nordescribed. Even though numerous characteristics and advantages of thepresent technology have been set forth in the foregoing description,together with details of the structure and function of the presentdisclosure, the disclosure is illustrative only, and changes may be madein the detail, especially in matters of shape, size and arrangement ofthe parts within the principles of the present disclosure up to, andincluding the full extent established by the broad general meaning ofthe terms used in the claims. It will therefore be appreciated that theembodiments described above may be modified within the scope of theclaims.

What is claimed is:
 1. An image device comprising: a plurality of redsub-pixels; a plurality of green sub-pixels; a plurality of bluesub-pixels; a plurality of white sub-pixels; and a plurality of yellowsub-pixels; wherein a ratio of the total number of red sub-pixels to thetotal number of green sub-pixels to the total number of blue sub-pixelsto the total number of white sub-pixels and to the total number ofyellow sub-pixels is about 3:3:3:2:1; and wherein the red sub-pixels,the green sub-pixels, the blue sub-pixels, the white sub-pixels, and theyellow sub-pixels are arranged in a matrix of rows and columns; and inany two adjacent rows, the white sub-pixels and the yellow sub-pixelsare arranged in the same row; and in this row, white sub-pixels andyellow sub-pixels are separately disposed, and two white sub-pixels arearranged between two yellow sub-pixels.
 2. The image device of claim 1,wherein a ratio of the total area of red sub-pixels to the total area ofgreen sub-pixels to the total area of blue sub-pixels to the total areaof white sub-pixels and to the total area of yellow sub-pixels is about3:3:3:2:1.
 3. The image device of claim 1, wherein in any two adjacentcolumns having white sub-pixels, no yellow sub-pixel is arranged and thewhite sub-pixels are arranged in the same column; and in any twoadjacent columns having yellow sub-pixels, no white sub-pixel isarranged and the yellow sub-pixels are arranged in the same column. 4.The image device of claim 3, wherein the white sub-pixels in the samecolumn are separately disposed; and the yellow sub-pixels in the samecolumn are separately disposed.
 5. The image device of claim 4, whereinthe white sub-pixels and the yellow sub-pixels arranged in any twonearby columns, which are separated by one column without whitesub-pixels or yellow sub-pixels, are respectively arranged in differentrows.
 6. The image device of claim 5, wherein the white sub-pixelsarranged in any two nearby columns, which are separated by one columnwithout white sub-pixels or yellow sub-pixels, are respectively arrangedin different rows.
 7. The image device of claim 1, wherein the whitesub-pixels are arranged in the columns without yellow sub-pixels, andthe yellow sub-pixels are arranged in the columns without whitesub-pixels.
 8. The image device of claim 7, wherein the white sub-pixelsin the same column are separately disposed; and the yellow sub-pixels inthe same column are separately disposed.
 9. The image device of claim 8,wherein the white sub-pixels and the yellow sub-pixels arranged in anytwo adjacent columns are respectively arranged in different rows. 10.The image device of claim 9, wherein the white sub-pixels and the yellowsub-pixels arranged in any two separated columns are separated by twocolumns without white sub-pixels or yellow sub-pixels.
 11. The imagedevice of claim 10, wherein the white sub-pixels arranged in any twonearby columns, which are separated by one column without whitesub-pixels or yellow sub-pixels, are respectively arranged in differentrows.
 12. The image device of claim 1, wherein the white sub-pixels arearranged in the columns without yellow sub-pixels, and the yellowsub-pixels are arranged in the columns without white sub-pixels.
 13. Theimage device of claim 12, wherein the white sub-pixels and the yellowsub-pixels arranged in any two adjacent columns are respectivelyarranged in different rows; and the white sub-pixels arranged in any twoadjacent columns are respectively arranged in different rows.
 14. Theimage device of claim 1, wherein in any two adjacent columns, all of thewhite sub-pixels and the yellow sub-pixels are arranged in the samecolumn; and in the column, white sub-pixels and yellow sub-pixels areseparately disposed, and two white sub-pixels are arranged between twoyellow sub-pixels.
 15. The image device of claim 14, wherein the whitesub-pixels are arranged in the rows without yellow sub-pixels, and theyellow sub-pixels are arranged in the rows without white sub-pixels. 16.The image device of claim 15, wherein the white sub-pixels and theyellow sub-pixels arranged in any two adjacent rows are respectivelyarranged in different columns.
 17. The image device of claim 1, whereinall the sub-pixels form a plurality of RGBW pixels and a plurality ofRGBY pixels, each of the RGBW pixel comprising one red sub-pixel, onegreen sub-pixel, one blue sub-pixel, and one white sub-pixel; each ofthe RGBY pixel comprising one red sub-pixel, one green sub-pixel, oneblue sub-pixel, and one yellow sub-pixel.